/*
  style.css — Uber/Base look, tokens from docs/DESIGN.md.
  How to change this: edit the CSS variables in :root. Colours are a black-and-white duet;
  the pill (999px) is the signature interactive shape; cards round to 16px.
  Profit/loss greens & reds are a documented trading-only extension (unused in Step 1).
*/
:root {
  --ink: #000000;
  --on-primary: #ffffff;
  --canvas: #ffffff;
  --canvas-soft: #efefef;
  --canvas-softer: #f3f3f3;
  --surface-pressed: #e2e2e2;
  --body: #5e5e5e;
  --mute: #afafaf;

  --profit: #1a7f37;   /* trading-only extension */
  --loss: #d12d2d;     /* trading-only extension */

  --r-md: 8px;
  --r-xl: 16px;
  --r-pill: 999px;

  --s-sm: 8px;
  --s-md: 12px;
  --s-lg: 16px;
  --s-xl: 20px;
  --s-2xl: 24px;
  --s-3xl: 32px;

  --font: "Inter", system-ui, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  color: var(--ink);
  background: var(--canvas);
}

h1, h2, h3 { font-weight: 700; margin: 0 0 var(--s-md); }
.display { font-size: 36px; line-height: 44px; }
.display-sm { font-size: 20px; line-height: 28px; }
.muted { color: var(--body); margin: 0 0 var(--s-lg); }

/* Buttons — pill is the signature shape */
.btn-primary, .btn-subtle {
  display: inline-block;
  border: none;
  border-radius: var(--r-pill);
  font-family: var(--font);
  font-size: 16px;
  font-weight: 500;
  padding: var(--s-md) var(--s-xl);
  cursor: pointer;
  text-decoration: none;
  transition: transform 120ms ease, background-color 120ms ease;
}
.btn-primary { background: var(--ink); color: var(--on-primary); }
.btn-subtle { background: var(--canvas-soft); color: var(--ink); }
.btn-primary:active, .btn-subtle:active { transform: scale(0.98); }

/* Flash messages */
.flash { max-width: 960px; margin: var(--s-lg) auto 0; }
.flash p {
  background: var(--canvas-soft); color: var(--ink);
  padding: var(--s-md) var(--s-lg); border-radius: var(--r-md); margin: 0 0 var(--s-sm);
}

/* Auth (login / status) */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: var(--s-lg); }
.auth-card {
  width: 100%; max-width: 420px;
  background: var(--canvas-soft); border-radius: var(--r-xl); padding: var(--s-3xl);
}
.auth-card label { display: block; font-size: 14px; font-weight: 500; margin: 0 0 var(--s-md); }
.auth-card input {
  width: 100%; margin-top: 6px;
  background: var(--canvas-softer); border: none; border-radius: var(--r-md);
  padding: var(--s-lg); font-family: var(--font); font-size: 16px;
}
.auth-card .btn-primary { width: 100%; margin-top: var(--s-sm); text-align: center; }

/* Nav */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--s-lg) var(--s-3xl); border-bottom: 1px solid var(--surface-pressed);
}
.nav-title { font-weight: 700; }
.nav-right { display: flex; align-items: center; gap: var(--s-md); }

/* Connection pill */
.pill { border-radius: var(--r-pill); padding: 6px var(--s-md); font-size: 14px; font-weight: 500; }
.pill-on { background: var(--ink); color: var(--on-primary); }
.pill-off { background: var(--canvas-soft); color: var(--body); }

/* Dashboard */
.dash { max-width: 1260px; margin: 0 auto; padding: var(--s-3xl); display: grid; gap: var(--s-2xl); }
.card { background: var(--canvas); border-radius: var(--r-xl); padding: var(--s-2xl); border: 1px solid var(--surface-pressed); }
.connect-card .btn-primary { margin-top: var(--s-sm); }

.ticks { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-2xl); }
.tick-card { text-align: center; }
.tick-name { color: var(--body); font-size: 14px; font-weight: 500; letter-spacing: 0.04em; }
.tick-value { font-size: 44px; font-weight: 700; margin: var(--s-sm) 0 0; transition: color 200ms ease; }
.tick-value.flash-up { animation: flashfade 600ms ease; }
@keyframes flashfade { from { background: var(--canvas-soft); } to { background: transparent; } }
.day-extreme { color: var(--body); font-size: 13px; margin: var(--s-sm) 0 0; }
.day-extreme span { font-weight: 700; color: var(--ink); }
.candle {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12px; color: var(--mute); margin: 4px 0 0;
}

/* Splitting line / zones */
.levels { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-2xl); }
.level-date { color: var(--body); font-size: 13px; margin: 0 0 var(--s-md); }
.zone { font-size: 14px; padding: var(--s-sm) var(--s-md); border-radius: var(--r-md); margin-top: var(--s-sm); }
.zone strong { font-weight: 700; }
.zone-sell { background: rgba(209, 45, 45, 0.08); color: var(--loss); }
.zone-buy { background: rgba(26, 127, 55, 0.08); color: var(--profit); }
.rungs { list-style: none; margin: var(--s-sm) 0 0; padding: 0 0 0 var(--s-md);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 13px; color: var(--body); }
.rungs li { padding: 2px 0; }
.rungs-sell li { border-left: 2px solid var(--loss); padding-left: var(--s-sm); }
.rungs-buy li { border-left: 2px solid var(--profit); padding-left: var(--s-sm); }

/* Live log */
.log-feed {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px; line-height: 1.5; color: var(--ink);
  max-height: 320px; overflow-y: auto; background: var(--canvas-softer);
  border-radius: var(--r-md); padding: var(--s-lg); margin-top: var(--s-md);
}
.log-feed .line { padding: 2px 0; animation: appear 300ms ease; }
@keyframes appear { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* Tabs */
.tabs-nav { display: flex; gap: var(--s-sm); }
.tab-btn {
  border: none; background: var(--canvas-soft); color: var(--body);
  border-radius: var(--r-pill); padding: var(--s-sm) var(--s-xl);
  font-family: var(--font); font-size: 15px; font-weight: 500; cursor: pointer;
}
.tab-btn.active { background: var(--ink); color: var(--on-primary); }
.tab-content { display: none; gap: var(--s-2xl); }
.tab-content.active { display: grid; }

/* Positions tab */
.position-card { text-align: left; }
.pos-empty { color: var(--mute); margin: var(--s-md) 0 0; }
.pos-dir { font-size: 13px; font-weight: 700; letter-spacing: 0.04em; color: var(--body); margin: var(--s-sm) 0 0; }
.pos-pl { font-size: 32px; font-weight: 700; margin: 4px 0 var(--s-md); }
.pos-pl-up { color: var(--profit); }
.pos-pl-down { color: var(--loss); }
.pos-grid {
  display: grid; grid-template-columns: auto 1fr; gap: 4px var(--s-md); margin: 0;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 13px;
}
.pos-grid dt { color: var(--body); }
.pos-grid dd { margin: 0; text-align: right; font-weight: 700; }
.pos-count { color: var(--body); font-size: 13px; margin: var(--s-md) 0 0; }
.pos-count span { font-weight: 700; color: var(--ink); }
.pos-note { margin: 0; }

/* P&L tab */
.pnl-head { display: flex; align-items: center; justify-content: space-between; }
.pnl-head .btn-subtle { padding: var(--s-sm) var(--s-lg); font-size: 14px; }
.pnl-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--s-lg); }
.pnl-card-title { font-size: 13px; font-weight: 700; letter-spacing: 0.04em; color: var(--body); margin: 0; }
.pnl-total { font-size: 28px; font-weight: 700; margin: 4px 0; }
.pnl-meta { color: var(--body); font-size: 13px; margin: 0; }
.pnl-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.pnl-table th, .pnl-table td {
  text-align: left; padding: var(--s-sm) var(--s-md); border-bottom: 1px solid var(--surface-pressed);
}
.pnl-table th { color: var(--body); font-weight: 500; font-size: 12px; letter-spacing: 0.03em; }
.pnl-table td { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
.pnl-empty { margin: var(--s-md) 0 0; }

@media (max-width: 600px) {
  .ticks, .levels { grid-template-columns: 1fr; }
  .dash, .nav { padding: var(--s-lg); }
}